can substitute
Verbo regular: substitute - substituted- substituted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can substitute
you can substitute
he can substitute
we can substitute
you can substitute
they can substitute 	I can be substituting
you can be substituting
he can be substituting
we can be substituting
you can be substituting
they can be substituting	I can have substituted
you can have substituted
he can have substituted
we can have substituted
you can have substituted
they can have substituted	I can have been substituting
you can have been substituting
he can have been substituting
we can have been substituting
you can have been substituting
they can have been substituting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't substitute
you can't substitute
he can't substitute
we can't substitute
you can't substitute
they can't substitute 	I can't be substituting
you can't be substituting
he can't be substituting
we can't be substituting
you can't be substituting
they can't be substituting	I can't have substituted
you can't have substituted
he can't have substituted
we can't have substituted
you can't have substituted
they can't have substituted	I can't have been substituting
you can't have been substituting
he can't have been substituting
we can't have been substituting
you can't have been substituting
they can't have been substituting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I substitute?
can you substitute?
can he substitute?
can we substitute?
can you substitute?
can they substitute? 	can I be substituting?
can you be substituting?
can he be substituting?
can we be substituting?
can you be substituting?
can they be substituting? 	can I have substituted?
can you have substituted?
can he have substituted?
can we have substituted?
can you have substituted?
can they have substituted? 	can I have been substituting?
can you have been substituting?
can he have been substituting?
can we have been substituting?
can you have been substituting?
can they have been substituting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I substitute?
can't you substitute?
can't he substitute?
can't we substitute?
can't you substitute?
can't they substitute? 	can't I be substituting?
can't you be substituting?
can't he be substituting?
can't we be substituting?
can't you be substituting?
can't they be substituting? 	can't I have substituted?
can't you have substituted?
can't he have substituted?
can't we have substituted?
can't you have substituted?
can't they have substituted? 	can't I have been substituting?
can't you have been substituting?
can't he have been substituting?
can't we have been substituting?
can't you have been substituting?
can't they have been substituting?